Another issue on coherence relations is about polynary relations which involve more than two EDUs.
The first scenario is that one EDU dominates a set of posterior EDUs as its member.
In this case, we annotate binary relations from head EDU to each member EDU with the same relation.
The second scenario is that several EDUs are of equal importance in a polynary relation.
For this case, we link each former EDU to its neighboring EDU with the same relation, forming a relation chain similar to “right-heavy” binarization transformation in [1]}.
